计算下面各题,怎样简便就怎样算. (1)(125+ 7 32 )×8 (2) 19 4 ×20%
计算下面各题,怎样简便就怎样算.(1)(125+732)×8(2)194×20%+194×45(3)25×32×125(4)99×1100(5)[34×(122-21-1...
计算下面各题,怎样简便就怎样算. (1)(125+ 7 32 )×8 (2) 19 4 ×20%+ 19 4 × 4 5 (3)25×32×125 (4)99× 1 100 (5)[ 3 4 ×(122-21-1)÷ 1 100 ] (6) 1 27 ÷ 4 5 × 125 2 × 4 5 ×270.
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可爱宝宝_043
推荐于2016-07-26
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(1)(125+ )×8, =125×8+ ×8, =1000+1.75, =1001.75;
(2) ×20%+ × , = ×(20%+ ), = ×1, = ;
(3)25×32×125, =25×(4×8)×125, =(25×4)×(8×125), =100×1000, =100000;
(4)99× , =(100-1)× , =100× -1× , =1- , = ;
(5) ×(122-21-1)÷ , = ×100÷ , =75÷ , =7500;
(6) ÷ × × ×270, = × × × ×270, =125×5, =625. |
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