计算下面各题,能简算的要简算。
0.83×1.2−0.17 1.25×32×0.25
(1.25−0.125)×8 0.25×16.2×4
2.37×6.3+23.7×0.37 9.8×1.3+0.98×87
3.72×3.5+6.28×3.5 1.28×8.6+0.72×8.6
0.83×1.2−0.17 1.25×32×0.25
(1.25−0.125)×8 0.25×16.2×4
2.37×6.3+23.7×0.37 9.8×1.3+0.98×87
3.72×3.5+6.28×3.5 1.28×8.6+0.72×8.6
答案:
0.83×1.2−0.17
=0.996−0.17
=0.826
1.25×32×0.25
=1.25×8×(4×0.25)
=10×1
=10
(1.25−0.125)×8
=1.25×8−0.125×8
=10−1
=9
0.25×16.2×4
=0.25×4×16.2
=1×16.2
=16.2
2.37×6.3+23.7×0.37
=2.37×6.3+2.37×3.7
=2.37×(6.3+3.7)
=2.37×10
=23.7
9.8×1.3+0.98×87
=9.8×1.3+9.8×8.7
=9.8×(1.3+8.7)
=9.8×10
=98
3.72×3.5+6.28×3.5
=3.5×(3.72+6.28)
=3.5×10
=35
1.28×8.6+0.72×8.6
=(1.28+0.72)×8.6
=2×8.6
=17.2
=0.996−0.17
=0.826
1.25×32×0.25
=1.25×8×(4×0.25)
=10×1
=10
(1.25−0.125)×8
=1.25×8−0.125×8
=10−1
=9
0.25×16.2×4
=0.25×4×16.2
=1×16.2
=16.2
2.37×6.3+23.7×0.37
=2.37×6.3+2.37×3.7
=2.37×(6.3+3.7)
=2.37×10
=23.7
9.8×1.3+0.98×87
=9.8×1.3+9.8×8.7
=9.8×(1.3+8.7)
=9.8×10
=98
3.72×3.5+6.28×3.5
=3.5×(3.72+6.28)
=3.5×10
=35
1.28×8.6+0.72×8.6
=(1.28+0.72)×8.6
=2×8.6
=17.2
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