计算下面各题,能简便的就简便. 5.5×17.3+6.7×5.5 1.5×105 &...
计算下面各题,能简便的就简便.5.5×17.3+6.7×5.51.5×1059.18-9.18÷2.79.07-22.78÷3.43.8+4.29+2.1+4.23.56...
计算下面各题,能简便的就简便. 5.5×17.3+6.7×5.5 1.5×105 9.18-9.18÷2.79.07-22.78÷3.4 3.8+4.29+2.1+4.2 3.56+6.44÷2.3
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(1)5.5×17.3+6.7×5.5
=5.5×(17.3+6.7)
=5.5×24
=132;
(2)1.5×105
=1.5×(100+5)
=1.5×100+1.5×5
=150+7.5
=157.5;
(3)9.18-9.18÷2.7
=9.18-3.4
=5.78;
(4)9.07-22.78÷3.4
=9.07-6.7
=2.37;
(5)3.8+4.29+2.1+4.2
=(3.8+4.2)+(4.29+2.1)
=8+6.39
=14.39;
(6)3.56+6.44÷2.3
=3.56+2.8
=6.36.
=5.5×(17.3+6.7)
=5.5×24
=132;
(2)1.5×105
=1.5×(100+5)
=1.5×100+1.5×5
=150+7.5
=157.5;
(3)9.18-9.18÷2.7
=9.18-3.4
=5.78;
(4)9.07-22.78÷3.4
=9.07-6.7
=2.37;
(5)3.8+4.29+2.1+4.2
=(3.8+4.2)+(4.29+2.1)
=8+6.39
=14.39;
(6)3.56+6.44÷2.3
=3.56+2.8
=6.36.
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