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计算,能简算的要简算.1.25×2.25×0.89.7×99+9.74.8×7.8+78×0.523.65×10.1.
题目详情
计算,能简算的要简算.
1.25×2.25×0.8
9.7×99+9.7
4.8×7.8+78×0.52
3.65×10.1.
1.25×2.25×0.8
9.7×99+9.7
4.8×7.8+78×0.52
3.65×10.1.
▼优质解答
答案和解析
(1)1.25×2.25×0.8
=1.25×0.8×2.25
=1×2.25
=2.25;
(2)9.7×99+9.7
=9.7×(99+1)
=9.7×100
=970;
(3)4.8×7.8+78×0.52
=4.8×7.8+7.8×5.2
=(4.8+5.2)×7.8
=10×7.8
=78;
(4)3.65×10.1
=3.65×(10+0.1)
=3.65×10+3.65×0.1
=36.5+0.365
=36.865.
=1.25×0.8×2.25
=1×2.25
=2.25;
(2)9.7×99+9.7
=9.7×(99+1)
=9.7×100
=970;
(3)4.8×7.8+78×0.52
=4.8×7.8+7.8×5.2
=(4.8+5.2)×7.8
=10×7.8
=78;
(4)3.65×10.1
=3.65×(10+0.1)
=3.65×10+3.65×0.1
=36.5+0.365
=36.865.
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