G45.M3.S9.Q1

Solve 87 - 64 using the Zig-Zag method.

• 13

• 23

• 33

Solve 44 - 23 using the Zig-Zag method.

Solve 46 - 23 using the Zig-Zag method.​ (a)  

• 23
• 13
• 33
• 43

Solve 44 - 67 using the Zig-Zag method.​ (a)  

• -23
• -13
• -33

Solve 877 - 567 using the Zig-Zag method.

Solve 868 - 345 using the Zig-Zag method.

•  523 

•  533

Solve 457 - 208 using the Zig-Zag method.

• 229

• 239

• 249