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十几减9,徐州市翟山小学崔宇,9+()=11,9+()=14,9+()=15,9+()=17,2,5,6,8,1,9+2=11,1,9+2=11,1,9+2=11,119=,想:,9加()得11,2,11减9得2,2,摆一摆,算一算,2,129=,摆一摆,算一算,2,129=,想:,9加得12,12减9得,摆一摆,算一算,2,129=,想:,9加得12,12减9得,149=,摆一摆,算一算,2,129=,想:,9加得12,12减9得,149=,摆一摆,算一算,想:,9加得14,14减9得,3,3,139=,想:,9加()得13,4,3,139=,想:,9加()得13,4,169=,想:,9加()得16,7,4,159=,想:,9加()得15,6,179=,想:,9加()得17,8,189=,想:,9加()得18,9,做一做,1,149=,159=,4,7,4,7,