145×77加145乘21的简便运算

145×77加145乘21的简便运算
2026-05-19 12:27:47
推荐回答(5个)
回答1:


回答2:


回答3:

解: 145×77+145×21
=145×(77+21)
=145×98
=145×(100-2)
=14500-290
=14210

回答4:

145x77+145x21=145x(77+21)=145x98=145x(100-2)=145x100-145x2=14500-290=14210

回答5:

145×77+145×21
=145×(77+21)
=145×98
=145×(100-2)
=14500-290
=14210