Tintin is calculating (? +4)×25 What is the calculation error of this question? +4×25, the result is 48 less than the correct answer, and then what? What is the meaning of this?
Hello!
(? +4)×25=25×? +4×25=25×? + 100
+4×25=? + 100
(? +4)×25-? -4×25=48
24×? =48
So what? =48÷24=2
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