如题所述
第1个回答 2020-03-15
98x25
=(100+2)×25
=100×25+2×25
=2500+50
=2550
运用乘法分配律
=(100+2)×25
=100×25+2×25
=2500+50
=2550
运用乘法分配律
第2个回答 2020-03-15
98×25
=(100-2)×25
=2500-50
=2450
=(100-2)×25
=2500-50
=2450
第3个回答 2020-03-15
方法一:
98×25
=(100-2)×25
=100×25-2×25
=2500-50
=2450
方法二:
98×25
=49×2×25
=49×(2×25)
=49×50
=2450
98×25
=(100-2)×25
=100×25-2×25
=2500-50
=2450
方法二:
98×25
=49×2×25
=49×(2×25)
=49×50
=2450
第4个回答 2020-03-15
98×25
=(100-2)×25
=100×25-2×25
=2500-50
=2450
=(100-2)×25
=100×25-2×25
=2500-50
=2450
第5个回答 2020-03-15
9 8x25 用简便方法怎么算?