Simplify this digit 640÷80×4 of20+639-72÷9
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We use BODMAS
Ques. 640÷80×4
Ans. 640÷80=80
80×4=320
2. 20+639-72÷9
72÷9=8
639+20=659
659-8=651
Then multiply
651×320=210880
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