10-2.65= 0.9×0.08= 528-349= 6+14.4= 24÷0.04=?
12.34-2.3= 0÷3.8= 0.77+0.33= 7÷1.4= 67.5+0.25=7.2÷8×4= 5-1.4-1.6=?
00÷125÷8= 1.9×4×0.5=
80×0.125= 3× = 6 6= 2 -( + )= 10 2=?
3.2×7÷3.2×7= ( - )×12= 187.7×11-187.7= 1- 62.5%=?
第二，寫下下列每個問題的簡單運算中使用的定律或性質
4 +3.2+5 +6.8 25×(8×0.4)×1.25 7 -(2 - )?
( ) ( ) ( )?
( + + )×72 93.5÷3 16÷2.5?
( ) ( ) ( )
720÷16÷5 630÷42 456-(256-36)
102×35 98×42 158+262+138 375+219+381+225
5001-247-1021-232 (181+2564)+2719 378+44+114+242+222
276+228+353+219 (375+1034)+(966+125) (2130+783+270)+1017
99+999+9999+99999 7755-(2187+755) 2214+638+286
3065-738-1065 899+344 2357-183-317-357
2365-1086-214 497-299 2370+1995