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脱式计算75×12+280÷35180÷[36÷(12+6)]38×101-38680+21×15-36024×134-34×24848-800÷16×1265×10281+82+86+79+75+78
题目详情
脱式计算 75×12+280÷35 | 180÷[36÷(12+6)] | 38×101-38 |
680+21×15-360 | 24×134-34×24 | 848-800÷16×12 |
65×102 | 81+82+86+79+75+78 |
▼优质解答
答案和解析
(1)75×12+280÷35
=900+8
=908;
(2)180÷[36÷(12+6)]
=180÷[36÷18]
=180÷2
=90;
(3)38×101-38
=38×(101-1)
=38×100
=3800;
(4)680+21×15-360
=680+315-360
=995-360
=635;
(5)24×134-34×24
=24×(134-34)
=24×100
=2400;
(6)848-800÷16×12
=848-50×12
=848-600
=248;
(7)65×102
=65×(100+2)
=65×100+65×2
=6500+130
=6630;
(8)81+82+86+79+75+78
=(81+79)+(82+78)+(86+75)
=160+160+161
=481.
=900+8
=908;
(2)180÷[36÷(12+6)]
=180÷[36÷18]
=180÷2
=90;
(3)38×101-38
=38×(101-1)
=38×100
=3800;
(4)680+21×15-360
=680+315-360
=995-360
=635;
(5)24×134-34×24
=24×(134-34)
=24×100
=2400;
(6)848-800÷16×12
=848-50×12
=848-600
=248;
(7)65×102
=65×(100+2)
=65×100+65×2
=6500+130
=6630;
(8)81+82+86+79+75+78
=(81+79)+(82+78)+(86+75)
=160+160+161
=481.
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