北师大三年级数学上册《小熊购物》2.说一说先算什么,再算什么,并计算。
4x6+25 54+36-18
=24+25 =90-18
=29 =72
42+8x4 9x8+22
=42+32 =72+22
=74 =94
100-75+25 33+7x3
=25+25 =33+21
=50 =54
北师大三年级数学上册《小熊购物》2.说一说先算什么,再算什么,并计算。
4x6+25 54+36-18
=24+25 =90-18
=29 =72
42+8x4 9x8+22
=42+32 =72+22
=74 =94
100-75+25 33+7x3
=25+25 =33+21
=50 =54