35×25×4 25×166×4 8×(25×15)
20×72×5 15×11×2 71×8×5
39×20×5 15×3×4 125×7×4.
填一填.
(1)(100+2)×43= ×43+ ×43
(2)9×37+9×63= ×( + )
(3)(100﹣25)×4= ×4﹣25×
(4)a×b+a×c= ×( + )
用简便方法计算.
37×0.125×8
0.4×63×2.5
100﹣63.29﹣36.71
0.02×38.7×50
4.86×9.9
4.9×1.O2.
计算:
①3×(x+9)=27
②16×8﹣7x=23
③7.5﹣7.5×0.5﹣2.6×0.8
④13.7×6.5+5.9×13.7﹣12.4×3.7
⑤50×[(0.2+4.8﹣4.8+0.2)÷2]
⑥11.25+21.25+31.25+41.25+51.25+61.25+71.25+81.25.
试题篮
()