道
17×40= 100-63= += ×= 14-= ÷= ×500= += 10-= 4÷20= ×200= -= ÷15= ×= 4×= +=
×99= 420÷35= 25×12= 135÷=
3/4 + 1/4 = 2 + 4/9 = 3 - 2/3 = 3/4 - 1/2= 1/6 + 1/2 -1/6 = += 7/8 + 3/8 =
3/10 +1/5 = 4/5 - 7/10 = 2 - 1/6 -1/3 = ÷17= +19= ÷= ×= ×= 1÷5= 6÷12= -= 17×40= 100-63= += ×= 14-= ÷= ×500= += 10-= 4÷20= ×200= -= ÷15= ×= 4×= +=
×99= 420÷35= 25×12= 135÷=
3/4 + 1/4 = 2 + 4/9 = 3 - 2/3 = 3/4 - 1/2= 1/6 + 1/2 -1/6 = += 7/8 + 3/8 =
3/10 +1/5 = 4/5 - 7/10 = 2 - 1/6 -1/3 = ÷17= +19= ÷= ×= ×= 1÷5= 6÷12= -= 17×40= 100-63= += ×= 14-= ÷= ×500= += 10-= 4÷20= ×200= -= ÷15= ×= 4×= +=
×99= 420÷35= 25×12= 135÷=
3/4 + 1/4 = 2 + 4/9 = 3 - 2/3 = 3/4 - 1/2= 1/6 + 1/2 -1/6 = += 7/8 + 3/8 =
3/10 +1/5 = 4/5 - 7/10 = 2 - 1/6 -1/3 = ÷17= +19= ÷= ×= ×= 1÷5= 6÷12= -= 17×40= 100-63= += ×= 14-= ÷= ×500= += 10-= 4÷20= ×200= -= ÷15= ×= 4×= +=
×99= 420÷35= 25×12= 135÷=
3/4 + 1/4 = 2 + 4/9 = 3 - 2/3 = 3/4 - 1/2= 1/6 + 1/2 -1/6 = += 7/8 + 3/8 =
3/10 +1/5 = 4/5 - 7/10 = 2 - 1/6 -1/3 = ÷17= +19= ÷= ×= ×= 1÷5= 6÷12= -= 17×40= 100-63= += ×=
14-= ÷= ×500= += 10-= 4÷20= ×200= -= ÷15= ×= 4×= +=
×99= 420÷35= 25×12= 135÷=
3/4 + 1/4 = 2 + 4/9 = 3 - 2/3 = 3/4 - 1/2= 1/6 + 1/2 -1/6 = += 7/8 + 3/8 =
3/10 +1/5 = 4/5 - 7/10 = 2 - 1/6 -1/3 = ÷17= +19= ÷= ×= ×= 1÷5= 6÷12= -= 17×40= 100-63= += ×= 14-= ÷= ×500= += 10-= 4÷20= ×200= -= ÷15= ×= 4×= +=
×99= 420÷35= 25×12= 135÷=
3/4 + 1/4 = 2 + 4/9 = 3 - 2/3 = 3/4 - 1/2= 1/6 + 1/2 -1/6 = += 7/8 + 3/8 =
3/10 +1/5 = 4/5 - 7/10 = 2 - 1/6 -1/3 =
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