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用递等式计算.(能简算的要简算,)7.5-0.26-1.74+2.53.9+0.56+6.1+0.443.12+3.12×991.25×3.2×254.75×[60÷(3.24-3.04)].
题目详情
用递等式计算.(能简算的要简算,)
7.5-0.26-1.74+2.5
3.9+0.56+6.1+0.44
3.12+3.12×99
1.25×3.2×25
4.75×[60÷(3.24-3.04)].
7.5-0.26-1.74+2.5
3.9+0.56+6.1+0.44
3.12+3.12×99
1.25×3.2×25
4.75×[60÷(3.24-3.04)].
▼优质解答
答案和解析
(1)7.5-0.26-1.74+2.5
=(7.5+2.5)-(0.26+1.74)
=10-2
=8
(2)3.9+0.56+6.1+0.44
=(3.9+6.1)+(0.56+0.44)
=10+1
=11
(3)3.12+3.12×99
=3.12×(1+99)
=3.12×100
=312
(4)1.25×3.2×25
=(1.25×0.8)×(4×25)
=1×100
=100
(5)4.75×[60÷(3.24-3.04)]
=4.75×[60÷0.2]
=4.75×300
=1425
=(7.5+2.5)-(0.26+1.74)
=10-2
=8
(2)3.9+0.56+6.1+0.44
=(3.9+6.1)+(0.56+0.44)
=10+1
=11
(3)3.12+3.12×99
=3.12×(1+99)
=3.12×100
=312
(4)1.25×3.2×25
=(1.25×0.8)×(4×25)
=1×100
=100
(5)4.75×[60÷(3.24-3.04)]
=4.75×[60÷0.2]
=4.75×300
=1425
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