32乘大括号168减括号89+43括号括号简便计算
计算下列各题(能简便的要简便)101×32(24×15-290)÷5271×24-24×17132×12532×[168-(89+43)]45×99+45...
计算下列各题(能简便的要简便) 101×32 (24×15-290)÷5 271×24-24×171 32×125 32×[168-(89+43)] 45×99+45
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(1)101×32
=(100+1)×32
=100×32+1×32
=3200+32
=3232;
(2)(24×15-290)÷5
=(360-290)÷5
=70÷5
=14;
(3)271×24-24×171
=(271-171)×24
=100×24
=2400;
(4)32×125
=4×8×125
=4×(8×125)
=4×1000
=4000;
(5)32×[168-(89+43)]
=32×[168-132]
=32×36
=1152;
(6)45×99+45
=45×(99+1)
=45×100
=4500.
=(100+1)×32
=100×32+1×32
=3200+32
=3232;
(2)(24×15-290)÷5
=(360-290)÷5
=70÷5
=14;
(3)271×24-24×171
=(271-171)×24
=100×24
=2400;
(4)32×125
=4×8×125
=4×(8×125)
=4×1000
=4000;
(5)32×[168-(89+43)]
=32×[168-132]
=32×36
=1152;
(6)45×99+45
=45×(99+1)
=45×100
=4500.
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