42.8×9.9+42.8的简便运算
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42.8×9.9+42.8的简便运算
42.8×9.9+42.8的简便运算
42.8×9.9+42.8的简便运算
42.8×9.9+42.8
=42.8x10.9
=466.52
42.8×9.9+4.28
=42.8x10
=428
42.8x10-42.8x0.1+42.8=
42.8×10
42.8×9.9+42.8的简便运算
42.8×9.9+42.8的简便运算
42.8×9.9+42.8的简便运算
42.8×9.9+42.8
=42.8x10.9
=466.52
42.8×9.9+4.28
=42.8x10
=428
42.8x10-42.8x0.1+42.8=
42.8×10