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420÷60＝ 5×20＝ 18×4＝ 9×120＝ 60×5＝

30×5＝ 360÷40＝ 400×50＝ 96÷4＝ 303×20＝

0.4×2= 0.01×26= 0.05×6=

3.47+3.04×9.5 8.4×9.05+1.6×9.05 19.3- 5.27-4.73

8.14+4.6+1.86+7.4 2.5×12.6- 25×0.06 7.35×0.08×12.5

9.36×7.4= 0.49×5.06= 0.308×0.85=

6.24×25= 0.713×1.6= 87.2×0.15=

0.03×10= 2.1×4= 0.8×0.9= 1.6×3=

0.0097×1000= 0.6×0.09= 1.9+0.4= 2.8×0.2=

A.2B.20C.4.8D.16.5

A.0.3B.82.5C.8.25D.2.5