STEP PRESENTATION

Identify -28×9=9×28

9+(20+8)=20+(9+8)

98×1=98

99×(15+7)

96×0=0

• commutative

  associative

  identity

  distributive

  zero

• zero

  identity

  zero

  commutative

  zero

• zero

  zero

  zero

  zero

  identity

• commutative

  identity

  identity

  distributive

  zero

• all are distributive

Use the laws to solve: 99×99

897×98=

• 897×(100-2)=87,906

• 897×98=87,906

• 900×98=87,906

• 897×(97+1)=87,906

67+193+746+254+90

• (67+193)+(746+254)+90=1350

• 1350

• 2690

• 7380

987-895+22=???(use near multiples)

• 1000-900-6+20=114

• 987-895+22=129

• 900-800+30=130

Jimmy has 98 video games if he sells 88 of them for 3₹ each and 10 for 6₹ each how much money does he make?

• 264+60=324₹

• (88×3)+(10×6)=324₹

• 270+60=330

• 3₹-88×3=264

  6₹-10×6=60

  total-324

(7×3)+(7×4)=7×(3+4)

• True

• False

55×5=

jimmy has 2314 apples if he divides them into 2 per bag how much money will he make if he sells per bag for 3₹

• 3471

• 4483

• 9357

• 999