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| (1)28×25, =4×7×25, =(25×4)×7, =100×7, =700; (2)132+(265+68), =(132+68)+265, =200+265, =465; (3)210÷35, =210÷(7×5), =(210÷7)÷5, =30÷5 =6; (4)295-153-47 =295-(153+47), =295-200 =95. |
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a.12×(4+25)[ ]
a. 47+(14×5)(1)35+65=
65+35=
35+65○65+35