①122﹣36+64
=122﹣（36+64）
=122﹣100
=22 订正：①
②99×25
=（100﹣1）×25
=100﹣1×25
=75 订正：②
③720÷（8×3）
=720÷8×3
=90×3
=270 订正：③
相关试题
①122﹣36+64
=122﹣（36+64）
=122﹣100
=22 订正：①
②99×25
=（100﹣1）×25
=100﹣1×25
=75 订正：②
③720÷（8×3）
=720÷8×3
=90×3
=270 订正：③
= 
﹣7.8﹣2.2= 2.4÷
= 4.2+0.85=
= 3.1﹣
= 
÷6= （
+
）×12=
×
= 7÷
= 
﹣
= 0.64+3.6=
×9= 
×
+
×
= 
×
÷
+
=
﹣
= 6.5﹣0.72﹣28%=
×26= 0.04×25= 
÷
=
= 
×
÷
×
= 
﹣
= 
+
=
= 
×
= 0×
= 3÷
=
= 
÷8= 0.23=
﹣
= 4÷
﹣
×
= 24÷
= 0÷7.982= 10+10%=
= 
×
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