脱式计算,能简算的要简算.22.9-13.68+12.68 4.7×...
脱式计算,能简算的要简算.22.9-13.68+12.684.7×11-4.728.8×6.3-6.3×18.84.8+5.2÷45.37-(2.37-1.8)10.01...
脱式计算,能简算的要简算.22.9-13.68+12.68 4.7×11-4.7 28.8×6.3-6.3×18.8 4.8+5.2÷4 5.37-(2.37-1.8) 10.01-2.78+1.59.
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(1)22.9-13.68+12.68
=22.9-(13.68-12.68)
=22.9-1
=21.9;
(2)4.7×11-4.7
=4.7×(11-1)
=4.7×10
=47;
(3)28.8×6.3-6.3×18.8
=(28.8-18.8)×6.3
=10×6.3
=63;
(4)4.8+5.2÷4
=4.8+1.3
=6.1;
(5)5.37-(2.37-1.8)
=(5.37-2.37)+1.8
=3+1.8
=4.8;
(6)10.01-2.78+1.59
=(10.01+1.59)-2.78
=11.6-2.78
=8.82.
=22.9-(13.68-12.68)
=22.9-1
=21.9;
(2)4.7×11-4.7
=4.7×(11-1)
=4.7×10
=47;
(3)28.8×6.3-6.3×18.8
=(28.8-18.8)×6.3
=10×6.3
=63;
(4)4.8+5.2÷4
=4.8+1.3
=6.1;
(5)5.37-(2.37-1.8)
=(5.37-2.37)+1.8
=3+1.8
=4.8;
(6)10.01-2.78+1.59
=(10.01+1.59)-2.78
=11.6-2.78
=8.82.
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