x=
在 中、最接近0.
在 中,最接近 .
在 中,最接近1.
3+ = 5+ = +7= +2=
5÷6= 12÷7= 3÷8= 16÷9=
① + +
②1 - -
③ + -
④
⑤
⑥
13.5+2.5= 7.3×2= 7-2.7= 5÷12= 21.7÷7=
185×0.1= 1.25×8= 3+21.8×0= =
= = = =
= = =
① +( + )
② + + -
③ -( - )
④ - - -
1-0.08= - = - = - + =
0.4+ = + = 0.52= 1- - =