计算下面各题,能简算的要简算。
3.1×0.12+0.4 2.5×1.84×0.4
6.71−0.45×2.4 3.01×9.4−25
0.125×(0.8+80) 3.5×0.22+0.78×3.5
3.5×6.1+6.5×6.2 0.11×2.45+0.22×1.5
3.1×0.12+0.4 2.5×1.84×0.4
6.71−0.45×2.4 3.01×9.4−25
0.125×(0.8+80) 3.5×0.22+0.78×3.5
3.5×6.1+6.5×6.2 0.11×2.45+0.22×1.5
答案:
3.1×0.12+0.4 2.5×1.84×0.4
=0.372+0.4 =2.5×0.4×1.84
=0.772 =1×1.84
=1.84
6.71−0.45×2.4 3.01×9.4−25
=6.71−1.08 =28.294−25
=5.63 =3.294
0.125×(0.8+80)
=0.125×0.8+0.125×80
=0.1+10
=10.1
3.5×0.22+0.78×3.5
=3.5×(0.22+0.78)
=3.5×1
=3.5
3.5×6.1+6.5×6.2
=(3.5+6.5)×6.1+6.5×0.1
=61+0.65
=61.65
0.11×2.45+0.22×1.5
=0.11×2.45+0.11×2×1.5
=0.11×(2.45+3)
=0.11×5.45
=0.5995
=0.372+0.4 =2.5×0.4×1.84
=0.772 =1×1.84
=1.84
6.71−0.45×2.4 3.01×9.4−25
=6.71−1.08 =28.294−25
=5.63 =3.294
0.125×(0.8+80)
=0.125×0.8+0.125×80
=0.1+10
=10.1
3.5×0.22+0.78×3.5
=3.5×(0.22+0.78)
=3.5×1
=3.5
3.5×6.1+6.5×6.2
=(3.5+6.5)×6.1+6.5×0.1
=61+0.65
=61.65
0.11×2.45+0.22×1.5
=0.11×2.45+0.11×2×1.5
=0.11×(2.45+3)
=0.11×5.45
=0.5995
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