乘法算式:
乘法口诀:
90﹣44=
38+54=
27+49=
50﹣27﹣9=
98﹣42+29=
16+52+29=
90﹣47=
66+34=
67﹣32+28=
84﹣(56﹣18)=
5× =35 7× =42 2× =14
1× =7 7× =49 ×7=21