小学六年级数学简便运算练习题(3页).doc

-小学六年级数学简便运算练习题-第 3 页12.065.072.94 30.349.7610.34 ×3÷×3 25×7×4 34÷4÷1.7 1.25÷×0.8 102×7.3÷5.1 17+-7 1a+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 41.0619.7220.28 73+ 8+2-11+7+3a×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 1.06×2.5×413×÷ 29÷×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（2.682.97） 5.68（5.394.32） 19.68（2.979.68） 7+(-) 5-(-)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÷) 0.74÷(71×)24×(-+) (12+) ×7 （7-）×0.92×1.410.92×8.59 ×-×1.3×11.61.6×1.3 ×11.618.4×9999+999+99+9 4821-9983.2×12.5×25 1.25×88 3.6×0.25 7.6÷0.25 3.5÷0.1257.6÷7.6×4。 1.8×991.8 3.8×9.90.38 ×103-×2- 1.01×9.6102×0.87 2.6×9.9 ×31+ ×+÷ ×36 ×3813.5×27+13.5×72+13.5 1.5×7.4+0.6×150%+2÷ 5.3×+2.7×25% 0.67×10.16.7 28×21.62.8×16 5.6×1.70.56×83