奥数简便计算练习题
姓名
99+999+9999+99999      2.1 × 99 + 2.1      3.28 × 5.7 + 6.72 × 5.7
75×99+2×75           31×870+13×310       4×(25×65+25×28)
15X97+3               48X99+1              65+35X13
52×76+47×76+76  134×56-134+45×134
48×52×2-4×48     25×23×(40+4)     999×999+1999
23 × 0.1 + 2.3 × 9.9      0.18 +4.26 -0.18 +4.26
0.58 ×1.3 ÷ 0.58 ×1.3       7.3 ÷4 + 2.7 × 0.25
3.75 × 0.5 - 2.75 ÷ 2      5.26 × 0.125 + 2.74 ÷ 8
6.3 ÷ 1.8    9.5 ÷(1.9 × 8)  12.8 ÷ (0.4 × 1.6)
930 ÷ 0.6 ÷5     63.4 ÷ 2.5 ÷ 0.4      (7.7 + 1.54)÷ 0.7
6.9+4.8+3.1      15.+(6.75-5.)      5.4×11-5.4
7.85+2.34-0.85+4.66        35.6-1.8-15.6-7.2
13.75-(3.75+6.48)           47.8-7.45+2.55
66.86-8.66-1.34    0.25×16.2×4    0.25×32 ×0.125
2 .5 ×(4 +0.4)      (1.25-0.125)×8      4.8×100.1
4.2×99   56.5×9.9+5.65        7.09×10.8-0.8×7.09
3.83×4.56+3.83×5.44           3.65×4.7-36.5×0.37
13.7×0.25-3.7÷4         10.7×16.1-1.1×10.7 +10.7 ×5