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| ①125×32×25, =125×8×4×25, =(125×8)×(4×25), =1000×100, =100000; ②132×77+22×132+132, =132×(77+22+1), =132×100, =13200; ③1139-(350+139), =1139-350-139, =1139-139-350, =1000-350, =650; ④1170÷9÷13, =1170÷(9×13), =1170÷117, =10. |
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