40-20=[ ]A.20
B.60
C.2A
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- 2026-04-2740-20= [ ]A.20B.60C.2
- 2026-04-2760+30= [ ]A.9B.90C.30
- 2026-04-27( )比40多20,65比( )多15.
- 2026-04-27比70少30的数是 [ ]A．20 B．30 C．40
- 2026-04-27比20大10的数是多少?
- 2026-04-27口算你最棒. 10+10= 20+30= 70-40= 31+6= 48-3= 5+60=
- 2026-04-27看谁算得快. 25+7= 52+8= 68+8= 83-50= 24+50= 80-6= 94-30= 100-60= 30-30= 13+20= 27+6= 44+30=
- 2026-04-27连一连. ①44+5 ②30+16 ③54+2 ④90-60 56 49 30 46