{"id":84,"date":"2022-04-12T04:45:06","date_gmt":"2022-04-12T04:45:06","guid":{"rendered":"http:\/\/4thclass.deltapublications.in\/?page_id=84"},"modified":"2025-11-06T04:46:11","modified_gmt":"2025-11-06T04:46:11","slug":"d-10-estimate-products-multiply-by-larger-numbers","status":"publish","type":"page","link":"https:\/\/4thclass.deltapublications.in\/index.php\/d-10-estimate-products-multiply-by-larger-numbers\/","title":{"rendered":"D.10 Estimate products – multiply by larger numbers"},"content":{"rendered":"\n

Estimate products – multiply by larger numbers<\/strong><\/h2>\n\n\n\n

key points :<\/p>\n\n\n\n

What is Estimation?<\/strong> \ud83e\udd14<\/p>\n\n\n\n

Estimation means finding an approximate answer<\/strong> instead of the exact answer.<\/p>\n\n\n\n

Helps to save time<\/strong> \u23f1\ufe0f<\/p>\n\n\n\n

Useful for checking your answers<\/strong> \u2705<\/p>\n\n\n\n

Rounding Numbers<\/strong> \ud83d\udd22<\/p>\n\n\n\n

Before multiplying, round the numbers<\/strong> to the nearest:<\/p>\n\n\n\n

10<\/strong> (for tens)<\/p>\n\n\n\n

100<\/strong> (for hundreds)<\/p>\n\n\n\n

1,000<\/strong> (for thousands)<\/p>\n\n\n\n

Example:<\/strong><\/p>\n\n\n\n

47 \u2192 50<\/p>\n\n\n\n

326 \u2192 300<\/p>\n\n\n\n

Estimate the Product<\/strong> \u2716\ufe0f<\/p>\n\n\n\n

Steps:<\/strong><\/p>\n\n\n\n

Round each number.Multiply the rounded numbers.Write your answer as an <\/span>approximation<\/strong>.<\/span><\/strong><\/p>\n\n\n\n

Example: <\/p>\n\n\n\n

48 \u00d7 27 \u2248 50 \u00d7 30 = 1500<\/code> <\/strong><\/p>\n\n\n\n

\u2705 Estimated product = 1500<\/p>\n\n\n\n

When to Use Estimation<\/strong> \ud83d\udccc<\/p>\n\n\n\n

Checking homework \u2714\ufe0f<\/p>\n\n\n\n

Shopping \ud83d\uded2<\/p>\n\n\n\n

Quick calculations \u23e9<\/p>\n\n\n\n

Tips for Estimating<\/strong> \ud83d\udca1<\/p>\n\n\n\n

If numbers are close to a multiple of 10<\/strong>, round them to 10s<\/strong><\/p>\n\n\n\n

If numbers are big<\/strong>, round to 100s<\/strong> or 1,000s<\/strong><\/p>\n\n\n\n

Estimation does not have to be exact<\/strong>, it\u2019s about being close<\/strong><\/p>\n\n\n\n

Fun Trick!<\/strong> \ud83c\udf89<\/p>\n\n\n\n

Use friendly numbers<\/strong> (10, 20, 50, 100\u2026) for easier multiplication.
Example: 52 \u00d7 19 \u2248 50 \u00d7 20 = 1000<\/p>\n\n\n\n

Learn with an example<\/strong><\/h2>\n\n\n\n
\n
\n

\ud83d\udd25 Estimate the product. Round each factor to the nearest ten, then multiply.<\/p>\n\n\n\n

67 \u00d7 48<\/p>\n<\/div><\/div>\n\n\n\n

Round the first factor to the nearest ten.<\/p>\n\n\n\n

67<\/td> \u00d7 <\/td>48<\/td> = ?<\/td><\/tr>
<\/td><\/td><\/td><\/td><\/tr>
70<\/td> \u00d7 <\/td>48<\/td> = ?<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Round the second factor to the nearest ten.<\/p>\n\n\n\n

70<\/td> \u00d7 <\/td>48<\/td> = ?<\/td><\/tr>
<\/td><\/td><\/td><\/td><\/tr>
70<\/td> \u00d7 <\/td>50<\/td> = ?<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Now multiply:<\/p>\n\n\n\n

70 \u00d7 50 = 3,500<\/p>\n\n\n\n

The product is approximately 3,500.<\/p>\n\n\n\n

Compare your estimate to the exact answer:<\/p>\n\n\n\n

67 \u00d7 48 = 3,216<\/p>\n<\/div><\/div>\n\n\n\n

\n
\n

\ud83d\udd25 Estimate the product. Round each factor to the nearest ten, then multiply.<\/p>\n\n\n\n

77 \u00d7 41<\/p>\n<\/div><\/div>\n\n\n\n

Round the first factor to the nearest ten.<\/p>\n\n\n\n

77<\/td> \u00d7 <\/td>41<\/td> = ?<\/td><\/tr>
<\/td><\/td><\/td><\/td><\/tr>
80<\/td> \u00d7 <\/td>41<\/td> = ?<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Round the second factor to the nearest ten.<\/p>\n\n\n\n

80<\/td> \u00d7 <\/td>41<\/td> = ?<\/td><\/tr>
<\/td><\/td><\/td><\/td><\/tr>
80<\/td> \u00d7 <\/td>40<\/td> = ?<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Now multiply:<\/p>\n\n\n\n

80 \u00d7 40 = 3,200<\/p>\n\n\n\n

The product is approximately 3,200.<\/p>\n\n\n\n

Compare your estimate to the exact answer:<\/p>\n\n\n\n

77 \u00d7 41 = 3,157<\/p>\n<\/div><\/div>\n\n\n\n

\n
\n

\ud83d\udd25 Estimate the product. Round each factor to the nearest ten, then multiply.<\/p>\n\n\n\n

93 \u00d7 68<\/p>\n<\/div><\/div>\n\n\n\n

Round the first factor to the nearest ten.<\/p>\n\n\n\n

93<\/td> \u00d7 <\/td>68<\/td> = ?<\/td><\/tr>
<\/td><\/td><\/td><\/td><\/tr>
90<\/td> \u00d7 <\/td>68<\/td> = ?<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Round the second factor to the nearest ten.<\/p>\n\n\n\n

90<\/td> \u00d7 <\/td>68<\/td> = ?<\/td><\/tr>
<\/td><\/td><\/td><\/td><\/tr>
90<\/td> \u00d7 <\/td>70<\/td> = ?<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Now multiply:<\/p>\n\n\n\n

90 \u00d7 70 = 6,300<\/p>\n\n\n\n

The product is approximately 6,300.<\/p>\n\n\n\n

Compare your estimate to the exact answer:<\/p>\n\n\n\n

93 \u00d7 68 = 6,324<\/p>\n<\/div><\/div>\n\n\n\n

Let’s practice!\ud83d\udd8a\ufe0f <\/p>\n\n\n\n

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\"\"<\/a><\/figure>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

Estimate products – multiply by larger numbers key points : What is Estimation? \ud83e\udd14 Estimation means finding an approximate answer instead of the exact answer. Helps to save time \u23f1\ufe0f Useful for checking your answers \u2705 Rounding Numbers \ud83d\udd22 Before multiplying, round the numbers to the nearest: 10 (for tens) 100 (for hundreds) 1,000 (forContinue reading “D.10 Estimate products – multiply by larger numbers”<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"class_list":["post-84","page","type-page","status-publish","hentry","entry"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/4thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/pages\/84","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/4thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/4thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/4thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/4thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/comments?post=84"}],"version-history":[{"count":22,"href":"https:\/\/4thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/pages\/84\/revisions"}],"predecessor-version":[{"id":16676,"href":"https:\/\/4thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/pages\/84\/revisions\/16676"}],"wp:attachment":[{"href":"https:\/\/4thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/media?parent=84"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}