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能简算的要简算.57×l01-574.7+7.69+5.3+2.313.45+8.7+16.55+1.36.08+0.82+3.92+0.18.
题目详情
能简算的要简算.
57×l01-57
4.7+7.69+5.3+2.31
3.45+8.7+16.55+1.3
6.08+0.82+3.92+0.18.
57×l01-57
4.7+7.69+5.3+2.31
3.45+8.7+16.55+1.3
6.08+0.82+3.92+0.18.
▼优质解答
答案和解析
(1)57×l01-57
=57×(l01-1)
=57×100
=5700
(2)4.7+7.69+5.3+2.31
=(4.7+5.3)+(7.69+2.31)
=10+10
=20
(3)3.45+8.7+16.55+1.3
=(3.45+16.55)+(8.7+1.3)
=20+10
=30
(4)6.08+0.82+3.92+0.18
=(6.08+3.92)+(0.82+0.18)
=10+1
=11
=57×(l01-1)
=57×100
=5700
(2)4.7+7.69+5.3+2.31
=(4.7+5.3)+(7.69+2.31)
=10+10
=20
(3)3.45+8.7+16.55+1.3
=(3.45+16.55)+(8.7+1.3)
=20+10
=30
(4)6.08+0.82+3.92+0.18
=(6.08+3.92)+(0.82+0.18)
=10+1
=11
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