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用递等式计算,能简算的要简算.3.4×1.25+1.25×4.625×3.2×12.5(910+35)×(29-215)35÷[(56-23)×3]34-23×(58-12)(12-310)×(2-13)
题目详情
用递等式计算,能简算的要简算. 3.4×1.25+1.25×4.6 | 25×3.2×12.5 | (
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35÷[(
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▼优质解答
答案和解析
(1)3.4×1.25+1.25×4.6
=1.25×(4.6+3.4)
=1.25×8
=10
(2)25×3.2×12.5
=25×(8×0.4)×12.5
=(25×0.4)×(12.5×8)
=10×100
=1000
(3)(
+
)×(
-
)
=
×
=
(4)35÷[(
-
)×3]
=35÷[
×3]
=35÷
=35×2
=70
(5)
-
×(
-
)
=
-
×
=
-
=
(6)(
-
)×(2-
)
=(
-
)×
=
×
=
=1.25×(4.6+3.4)
=1.25×8
=10
(2)25×3.2×12.5
=25×(8×0.4)×12.5
=(25×0.4)×(12.5×8)
=10×100
=1000
(3)(
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