直接写出得数．1.3+2.7= 6﹣2.5= 0.57+5.7= 3.6﹣0.03=2.4+6.06= 8﹣1.95= 27÷1000= 0.05×100=25×12= 1×0÷1= 5.76÷100= 1÷0.1﹣1+0.1=
甲数是80，比乙数少20%，乙数是多少？
直接写得数．÷=×0=（+）×20= 0.32=÷×÷=
直接写出得数． ①1÷= ②3﹣1= ③×3= ④3.6×= ⑤+3.75= ⑥﹣= ⑦1﹣2÷7= ⑧36×（+）=
直接写出得数×=×12= 0.25÷2.5%= 51.3÷0.01= 4﹣= 0.75÷0.25=÷=×8÷8×=
直接写出得数．+=﹣=×=÷=×=﹣0.8=+=÷4= 3.5﹣2.9= 36.4÷100= 1.7×0.3= 4.8+2=×21= 9.82﹣0.2= 0.8÷0.002= 2.5×1.7×4=
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÷
=
×0=（
+
）×20=
÷
= ②3﹣1
= ③
=
+3.75= ⑥
﹣
= ⑦1﹣2÷7= ⑧36×（
+
×
=
×12= 0.25÷2.5%= 51.3÷0.01=
= 0.75÷0.25=
=
+
=
﹣
=
×
=
÷
×
=
﹣0.8=
+
=
÷4=
×21= 9.82﹣0.2= 0.8÷0.002= 2.5×1.7×4=