简便计算.
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| (1)45×7×2 =45×2×7 =90×7 =630 (2)4×9×250 =4×250×9 =1000×9 =9000 (3)11×125×8 =11×(125×8) =11×1000 =11000 (4)36×250 =9×4×250 =9×(4×250) =9×1000 =9000 (5)48×125 =6×8×125 =6×(8×125) =6×1000 =6000 (6)325+188+475 =325+475+188 =800+188 =988 |
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a.12×(4+25)[ ]
a. 47+(14×5)(1)35+65=
65+35=
35+65○65+35