班级_______ 姓名___________
写出计算过程，能简算要简算：
×21 56× × × ×
7× × 5 ×3 ×10 ×
× × × × ×12
3.6× 27× × 1×8 1×3
×12 ×5 ×1.6 ×15 19×
72× × × × ×24
48× × 28× 8×0.875 ×
150× 3.25× × 2× ×120
×5 1×18 15× ×24 ×
+ 108× 1× ×11 ×
× × ×7 ×1 ×
42× × ×34 × ＋4
×5 × 2×12 × 2× 3
×100 13× × ×× 9－
× 45× 1×21 × 3×22
42× ×× 35× ×2 4.5 ×
×3 ×2 ×22× × 2×1
×7 45× ×× 4.5×5 1× 0.4
14×4 ×12 ×× 3×22 3.3×2
1×0.32 2.7×1 4.4× 0.85× 1 2 ×5
1×3.5 3×3.5 2×0.56 2×12 3×14
2× 2×1 32 × 3 1.5 ×2 4×0.48
5×4 7×2 3×4 2.3×1 ×3.3－0.9
2×6×2.6 2.125× 2 ×6 ×34
1×1×2 1×× ××
2×× × 101 8+0.25×8 4× 1×
×6+6×0.375 (-)×50 ××
×35 2×3× 3× ×1 ××
2×1× ×1×1 ×46 ××
+× ×－ ××
－（－） ×（×） ×+×
0.25×7.89×0.4 32×12.5×2.5 3.6×7.2+3.6×2.8
×+× 24×（+－） （++）×40
75× 63× 98× 88 ×
×23+ 82×－ ×48+ +21×
(+)×24 ×36+×24 （－）×60