1. (2022二上·南浔期末) 口算

2×3=         4×3=          73-42=         5×5-6=

4×9=         54+29=         6×8=          7×9+17=

6+7=         9×8=           23-7=          3×8-4=

9×9=          3×7=          6×4=           9×6+30=