12.4+1.6×1.2简算
计算下面各题,能简算的要简算.1.56×1.7+0.44×1.7-0.72.5×1212.3×8×1.25(12.5+0.125)×89.24÷[0.5×(2.8+3.2...
计算下面各题,能简算的要简算. 1.56×1.7+0.44×1.7-0.7 2.5×12 12.3×8×1.25 (12.5+0.125)×8 9.24÷[0.5×(2.8+3.2)] 0.4+1.6×2.3
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(1)1.56×1.7+0.44×1.7-0.7
=(1.56+0.44)×1.7-0.7
=2×1.7-0.7
=3.4-0.7
=2.7
(2)2.5×12
=2.5×4×3
=10×3
=30
(3)12.3×8×1.25
=12.3×(8×1.25)
=12.3×10
=123
(4)(12.5+0.125)×8
=12.5×8+0.125×8
=100+1
=101
(5)9.24÷[0.5×(2.8+3.2)]
=9.24÷[0.5×6]
=9.24÷3
=3.08
(6)0.4+1.6×2.3
=0.4+3.68
=4.08
=(1.56+0.44)×1.7-0.7
=2×1.7-0.7
=3.4-0.7
=2.7
(2)2.5×12
=2.5×4×3
=10×3
=30
(3)12.3×8×1.25
=12.3×(8×1.25)
=12.3×10
=123
(4)(12.5+0.125)×8
=12.5×8+0.125×8
=100+1
=101
(5)9.24÷[0.5×(2.8+3.2)]
=9.24÷[0.5×6]
=9.24÷3
=3.08
(6)0.4+1.6×2.3
=0.4+3.68
=4.08
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