Unit 9 Math Review

Decompose

100

114+118

100+10+4     100+10+8

100+100=200         10+10=20           8+4=12

200+20+12= 232

200

232+428

200+30+2             400+20+8

200+400=600      30+20=50         2+8=10

600+50+10=660

300

478+356

400+70+8            300+50+6

400+300=700       70+50=120         8+6=14

700+120+14=834      

400

568+369

500+60+8            300+60+9  

500+300=800       60+60=120         8+9=17

800+120+17=937

500

612+394

600+10+2            300+90+4

600+300=900       10+90=100        4+2=6

900+100+4=1,006

Adjust Addends

100

152+325

477

200

264+368

632

300

504+329

833

400

683+312

995

500

643+406

1,049

Hundreds, Tens Ones Chart

100

316+209

525

200

225+520

745

300

425+446

871

400

494+439

933

500

782+181

963

What's the Error?

100

239+117

+1    -2

240+115= 355

They changed the numbers they were adjusting.

It should equal 356!

200

248+481

200+40+8      400+8+1

200+400+40+8+1= 649

They forgot to add the zero to the 8. 

It should be 729!

300

587+362

500+80+7   300+60+2

500+80+300+60+2=942

They forgot to add the 7.

It should be 949!

400

587+107=

+1    -1

588+106=694

They didn't adjust to a friendly number. 

500

The total number of tens in the sum of 654+342 is 8 tens. 

Wrong it is 9 tens they forgot to regroup

Random

100

When using the number line method what number do you start with?? 

The bigger number

200

What is an addend?

A number that you are adding

300

Solve using a number line:
256+412

668

400

What is the total number of tens?

148+234

8 Tens

500

What is partial sums?

The totals of the place values after being added