以内进位退位加减法练习

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1、20以内进位退位加减法练习姓名：时间：成绩：日期：5+8=7+6=12-6=7+5=9+6=8+6=9+5=7+7=5+6=2+9=5+9=8+5=5+9=12-7=12-8=17-8=17-9=8+7=3+8=7+9=3+10=10+5=13-4=8+7=5+8=7+7=13-7=8+5=5+6=15-7=9+9=15-8=6+5=7+8=4+8=9+6=8+7=6+7=5+8=6+7=7+5=6+8=8+3=4+6=15-9=6+6=4+9=14-7=8+3=12-9=instrumenthasasingletestcondition,w

2、illbetransferredtothecoordinationofthetestphase,theinstrumentaccordingtothestand-alonetrialsscheduled,withtheprocesspreparationoftestsolutions,equippedwithprofessionaltechniciansandskilledworkers,toensuresafetyandquality.6.weldingengineeringconstructionprogramme6.1thisengin

3、eeringusedconstructionspecification6.1.1siteequipment,andindustrialpipelineweldingengineeringconstructionandtheacceptancespecificationGB50268-976.1.2oilchemicaltoxic,andcanburningmediapipelineengineeringconstructionandtheacceptancespecificationSH3501-20026.1.3oilchemicallow

4、temperaturesteelweldingproceduresSH/T3520-20046.1.4oilchemicalchromenickelAustrian'sbodysteel,andironnickelalloyandnickelalloypipelineweldingproceduresSH/T3523-19996.1.5SHJ520-92petrochemicalengineeringtechnicalspecificationforweldingofCR-MOheat-resistantsteelpipe6.1.6ofthe

5、pressurevesselNDT4730-946.2JBweldpreparation6.2.1constructionaccordingtothematerialsoftheprojectspecificationsandweldingmethods,providingqualifiedweldingprocedurequalificationreport.6.2.2qualifiedweldingprocedurequalificationbasedonthepreparationofweldinginstruction,guideth

6、ewelderweldingoperations.6.2.3whereparticipationinsitewelding,mustbeinpossessionofboilerandpressurevesselweldercertificatesissuedbytheLaborDepartment.6.2.4whereinvolvedinthepipeandsteelstructureweldingwelders,welderbeforeentryexaminationsshouldattendtheowners,andconstructio

7、nshouldbemadewithinthescopeandeligibilityapprovedbythequalityandtechnologysupervisiondepartmentsandowners.6.2.5qualifyforweldingwelder,weldingprocess,shouldbeapprovedbyweldingtheweldingprocess.20以内进位退位加减法练习姓名：时间：成绩：日期：3+9=10-2=9+7=6+8=5+9=12-4=7+9=20-2=11-2=19-3=9+8=18-9=20

8、-9=12-7=10-8=17-8=9+2=8+3=6+8=9+2=6+9=15-5=7+9=11-5=8+4=13-3=6+7=12-2=8+5=14-5=7+9