小学六年级数学简便运算练习题 25×7×4 34÷4÷1.7 1.25÷×0.8 102×7.3÷5.1 17+ , 233755437-7 1-- 9917713 加法结合律, 连减方法: a+b+c=a+ (b + c ), a+b-c=a +(b-c), a-b+c=a –(b-c), a-b-c= a-( b +c); 933-15.7-4.3 41.06-19.72-20.28 7-3+ 8+2 25383847595322-9 11+7+3 535乘法交换律,连除方法: a×b×c=a×c×b a×b×c=a×(b×c), a×b÷c=a×(b÷c), a÷b÷c=a÷(b×c) , a÷b×c=a÷(b÷c), 700÷14÷5 18.6÷2.5÷0.4 1.96÷0.5÷4 1.06×2.5×4 1717131313×19÷19 29÷27×27 125×7×8 1 / 3 a+ (b + c )= a+b+c a +(b-c)= a+b-c a –(b-c)= a-b+c a-( b +c)= a-b-c; 19.68-(2.68+2.97) 5.68+(5.39+4.32) 19.68-(2.97+9.68) 7 乘法结合律,连除方法. (a×b)×c= a×(b×c) a×(b×c) = a×b×c, a×(b÷c) = a×b÷c, a÷(b×c) = a÷b÷c , a÷(b÷c) = a÷b×c, 1.25×( 8 ÷0.5) 0.25×( 4 × 1.2) 1.25×( 213×0.8) 9.3÷(4÷ (7252631+(-) 5-(-) 17181778710074113112) 0.74÷(71×) 24×(--+) (12+) ×7 93100128637319-)×5 0.92×1.41+0.92×8.59 16×7-3×7 52038513513 1.3×11.6-1.6×1.3 99×11.6+18.4× 9999+999+99+9 4821998 55- 2 / 3 3.2×12.5×25 1.25×88 3.6×0.25 7.6÷0.25 3.5÷0.125 1.8×99+1.8 3.8×9.9+0.38 777×103×2 252525-- 77×31+ 3232 1.01×9.6 102×0.87 2.6×9.9 1222173333×+÷ ×36 ×38 13.5×27+13.5×72+13.5 173353737 1.5×7.4+0.6×150%+2÷ 5.3×+2.7×25% 0.67×10.1-6.7 28×21.6-2.8×16 5.6×1.7+0.56×83 乘法分配律: (a+b)×c=a×c+b×c (a-b)×c=a×c-b×c 隐“1”法. 拆分法 2314 3 / 3 本文来源:https://www.wddqw.com/doc/6edf79eecad376eeaeaad1f34693daef5ef713ac.html