14-7.4=6.6, 1.92? 0.04=48, 0.32? 500= 160, 0.65+4.35= 5
10-5.4=4.6, 4? 20=0.2, 3.5? 200=700, 1.5-0.06= 1.44
0.75? 15=0.05, 0.4? 0.8=0.32, 4? 0.25= 1, 0.36+ 1.54=2
1.0 1? 99=99.99, 420? 35= 12, 25? 12=300, 135? 0.5=270
3/4 + 1/4 = 1, 2 + 4/9 =22/9, 3 - 2/3 =7/3, 3/4 - 1/2= 1/4
1/6 + 1/2 - 1/6 = 1/2, 7.5-(2.5+3.8)= 1.2, 7/8 + 3/8 =5/4
3/ 10 + 1/5 = 1/2, 4/5 - 7/ 10 = 1/ 10, 2 - 1/6 - 1/3 = 1.5
0.5 1? 17=0.03, 32.8+ 19=5 1.8, 5.2? 1.3=4, 1.6? 0.4= 0.64
4.9? 0.7=3.43, 1? 5=0.2, 6? 12=0.5, 0.87-0.49=0.38
Two-digit addition and subtraction oral arithmetic problems in the first volume of second grade mathematics
( 1)33 - 20 =
(2)48 + 52 =
(3)76 + 9 1 =
(4)32 + 86 =
(5)67 - 2 1 =
(6)89 - 80 =
(7)68 - 40 =
(8)52 + 29 =
(9)95 - 86 =
⑴30? 3=
⑵25+70=
⑶42? 7=
⑷54? 9=
⑸80? 3=
⑹0? 5=
⑺ 130? 3=
⑻400? 4=
⑼96-26=
⑽ 19+2 1=
⑾48-39=
⑿0+ 120=
⒀290-90=
⒁700? 6=
⒂230? 3=
⒃200? 9=
⒄54-30=
⒅900+ 100=
⒆89-29=
⒇400? 5=
(2 1) 10 1? 2=
(22)303? 3=
(23)404? 2=
(24) 1 10? 3=
(25) 105? 4=
(26) 100? 5=
(27)50? 6=
(28)600? 5=
(29)3? 20=
(30)24+75=
(3 1)45+ 1000=
(32)35? 7=
(33)67? 8=
(34)72? 9=
(35)63? 7=
(36)32? 8=
(37) 12? 4=
(38) 12+4=
(39)20? 5=
(40)7? 40=
(4 1)30? 5=
(42)200? 6=
(43)5? 300=
(44)0? 50=
(45) 1000? 8=
(46)4? 2000=
(47)200+5=
(48)600-500=
(49)30? 0=
(50)7? 8+20=