90÷3= 2﹣1.8= 300×14= 8000÷8=
40×70= 1200÷3= 0÷8= 500×300=
3600÷4= 11×60= 27×30= 5﹣1.6=
89×40≈ 23×49≈ 4.8+6= 93×60≈
90÷3= 2﹣1.8= 300×14= 8000÷8=
40×70= 1200÷3= 0÷8= 500×300=
3600÷4= 11×60= 27×30= 5﹣1.6=
89×40≈ 23×49≈ 4.8+6= 93×60≈
= 3×
÷3×
= 
=
= 0.25×0.4= 0.99×
×0= 
=
×
= 1÷
= 
×0.12×5= （
﹣
）×12=
的一半是多少？
= 
= 
=
= 
= 
=
=
是多少？
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