用你喜欢的方法计算下列各题:
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| (1)125×103-125×3 =125×(103-3) =125×100 =12500; (2)2700-425-175 =2700-(425+175) =2700-600 =2100; (3)125×88 =125×8×11 =1000×11 =11000; (4)25×7×4 =25×4×7 =100×7 =700; (5)32+26+74+168 =32+168+(26+74) =200+100 =300; (6)63×25+25×37 =(63+37)×25 =100×25 =2500; (7)99×32+32 =(99+1)×32 =100×32 =3200; (8)25×44 =25×4×11 =100×11 =1100; (9)48×213-13×48 =48×(213-13) =48×200 =9600; (10)41+127+59+173 =41+59+(173+127) =100+300 =400; (11)1300÷25÷4 =1300÷(25×4) =1300÷100 =13; (12)156×l0l-156 =156×(l0l-1) =156×l00 =15600. |
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