634-528+237350 427+318-159500
700-(120+356)324 307+(583-146) 776
①985-499+108 =985-607 =378 ( ) 改正: ②620-(320+186) =300+186 =486 ( ) 改正:
0.125×16= 1.04×5= 7×12÷7×120=
18.8×20%= ×0.55= 123+﹣123+=