2.58+3.26+5.42+6.74用简便

计算下面各题,能简算的要用简便方法计算. 24.5÷0.05×3.2 55÷(3.26+6.74) 4.8÷0.16÷0.3 9.65×99+9.65 0.25×32×1.25 1.48×0.58÷0.74.

(1)24.5÷0.05×3.2
=490×3.2
=1568;

(2)55÷(3.26+6.74)
=55÷10
=5.5;

(3)4.8÷0.16÷0.3
=30÷0.3
=100;

(4)9.65×99+9.65
=9.65×(99+1)
=9.65×100
=965;

(5)0.25×32×1.25
=0.25×4×8×1.25
=(0.25×4)×(8×1.25)
=1×10
=10;

(6)1.48×0.58÷0.74
=1.48÷0.74×0.58
=2×0.58
=1.16.
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